1、Designation: D5377 93 (Reapproved 2017)Standard Classification forRubber Compounding MaterialsGround Coal1This standard is issued under the fixed designation D5377; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last r
2、evision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This classification covers the compounding materialknown as ground coal. It is generally used in rubber com-pounds as a fill
3、er.1.2 There are three grades of ground coal based on particlesize, ash, and moisture. The selected values for these propertiesare suitable for use in a rubber compound.2. Referenced Documents2.1 ASTM Standards:2C1070 Test Method for Determining Particle Size Distribu-tion of Alumina or Quartz by La
4、ser Light ScatteringD1208 Test Methods for Common Properties of CertainPigmentsD3174 Test Method for Ash in the Analysis Sample of Coaland Coke from CoalD3175 Test Method for Volatile Matter in the AnalysisSample of Coal and CokeD4371 Test Method for Determining the Washability Char-acteristics of C
5、oal3. Significance and Use3.1 Ground coal is commonly used as an inexpensive fillerin rubber compounds as a direct or partial replacement forcarbon black or as a diluent in the compound.3.2 Ground coal is very compatible with most rubbers and isvery easily mixed into the compound.4. Basis of Classif
6、ication4.1 Particle size will have a direct effect on the modulus,tensile strength, and tear strength of the finished rubber.4.2 Ash in the coal will effect the specific gravity and highash can influence the curing characteristics of the rubber.4.3 Moisture in the ground coal at levels of 0.5 % and
7、abovecan cause blisters and scorch.4.4 Lowering the density (specific gravity) will reducecompounding cost and affect volume loading.4.5 Ground coal for use in rubber compounds shall conformto the three grades listed in Table 1.5. Keywords5.1 filler; ground coal1This classification is under the juri
8、sdiction of ASTM Committee D11 onRubber and Rubber-like Materials and is the direct responsibility of SubcommitteeD11.20 on Compounding Materials and Procedures.Current edition approved Feb. 1, 2017. Published March 2017. Originallyapproved in 1993. Last previous edition approved in 2012 as D5377 93
9、 (2012).DOI: 10.1520/D5377-93R17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International
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16、right Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 1 Properties of Ground CoalProperty (Maximum Values) Grade I Grade II Grade III Test MethodAverage particle size (m) not weighted 5 6 7 C1070Top particle size (m) 20 24 28 C1070Retained on 325 mesh (g) 0.0100 0
17、.0450 0.0950ARetained on 100 mesh (g) 0.0003 0.0005 0.0010AAsh,% 5 6 7 D3174Alpha quartz,% 1.0 1.50 2.0 X-Ray DiffractionHeat loss, % (moisture) 0.5 0.75 1.0 D3174Acidity 0.02 0.02 0.02 D1208Volatile matter,% 20 20 20 D3175Density (Mg/m3) (specific gravity) 1.35 1.45 1.55 D4371AMethod is being letter balloted in Subcommittee D11.11. Values based on 100 g samples.D5377 93 (2017)2
